The summer of 2010 finished up as the second wettest summer on record for the state of Iowa. June and July had a number of rainy days and in some of those rainfall events the rain came in torrents. The flooding continued in August in certain areas of the state.
Hillaker says parts of central and southeast Iowa received up to 16 inches of rain over the 31 days in August. Preliminary figures show Iowa had a statewide average of 23.3 inches of rain between June, July and August. That total surpasses the 22.57 inches of rain that fell over the three month period in 1902.
"This summer's rainfall total is actually quite a bit distant behind 1993 – which still ranks as the wettest summer on record," he adds. "We were about four inches below the 1993 total in 2010, but still 2010 produced the second highest rainfall total in 138 years of state records."
Temperatures across the state in August averaged about 3.5 degrees above normal – making it the sixth consecutive month with warmer than normal temperatures. Hillaker says 2010 was a relatively hot summer, despite the fact not a single city posted an official reading in the triple digits.
"The numbers aren't quite all in and finalized yet, but 2010 looks to be at least the warmest summer since 1995," he says. "It may even be the warmest summer since 1988 – which was a big drought year in Iowa." The highest official temperature recorded in Iowa this summer was 98 degrees on July 14 in Ankeny.